

package is2.io;

import is2.data.Instances;
import is2.data.SentenceData09;
import is2.util.DB;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;



/**
 * This class reads files in the CONLL-08 and CONLL-09 format.
 *
 * @author Bernd Bohnet
 */
public class CONLLReader04  {

	private static final String US = "_";
	private static final String REGEX = "\t";
	public static final String STRING = "*";
	public static final String PIPE = "\\|";
	public static final String NO_TYPE = "<no-type>";
	public static final String ROOT_POS = "<root-POS>";
	public static final String ROOT_LEMMA = "<root-LEMMA>";
	public static final String ROOT = "<root>";
	public static final String EMPTY_FEAT = "<ef>";

	private static final String NUMBER = "[0-9]+|[0-9]+\\.[0-9]+|[0-9]+[0-9,]+";
	private static final String NUM = "<num>";

	private BufferedReader inputReader;

	public static final int TASK08=8;
	public static final int TASK09=9;

	public static boolean normalizeOn =true;


	private int lineNumber = 0;

	public CONLLReader04(){}

	public CONLLReader04(String file){
		lineNumber=0;
		try {
			inputReader = new BufferedReader(new InputStreamReader(new FileInputStream(file),"UTF-8"),32768); //,"UTF-8"
 		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public CONLLReader04(String file, int task){
		this(file);
	}



	public void startReading(String file ){
		lineNumber=0;
		try {
			inputReader = new BufferedReader(new InputStreamReader(new FileInputStream(file),"UTF-8"),32768);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**i.forms[heads[l]-1]+" "+rel+" "+
	 * Read a instance
	 * @return a instance
	 * @throws Exception 
	 */
	public SentenceData09 getNext() throws Exception  {

		try {

			ArrayList<String[]> lineList = new ArrayList<String[]>();

			String line = inputReader.readLine();

			while(line !=null && line.length()<2) {
				line = inputReader.readLine();
				lineNumber++;
				System.out.println("skip empty line at line "+lineNumber);
			}

			while (line != null && line.length()!=0 &&  !line.startsWith(STRING) &&!line.startsWith(REGEX)) {
				lineList.add(line.split(REGEX));
				line = inputReader.readLine();
				lineNumber++;
			}



			int length = lineList.size();

			if(length == 0) {
				inputReader.close();
				return null;
			}

			SentenceData09 it = new SentenceData09();

			// column	content
			// 1	id
			// 2	form
			// 3	lemma
			// 4	cpos-tag
			// 5	pos-tog
			// 6	feats 
			// 7	head
			// 8	deprel


			it.forms = new String[length+1];

			it.plemmas = new String[length+1];
			it.gpos = new String[length+1];
			it.labels = new String[length+1];
			it.heads = new int[length+1];
			it.pheads = new int[length+1];
			it.plabels = new String[length+1];

			it.ppos = new String[length+1];
			it.lemmas = new String[length+1];
			it.fillp = new String[length+1];
			it.feats = new String[length+1][];
			it.ofeats = new String[length+1];
			it.pfeats = new String[length+1];


			it.forms[0] = ROOT;
			it.plemmas[0] = ROOT_LEMMA;
			it.fillp[0] = "N";
			it.lemmas[0] = ROOT_LEMMA;

			it.gpos[0] = ROOT_POS;
			it.ppos[0] = ROOT_POS;
			it.labels[0] = NO_TYPE;
			it.heads[0] = -1;
			it.plabels[0] = NO_TYPE;
			it.pheads[0] = -1;
			it.ofeats[0] = NO_TYPE;

			// root is 0 therefore start with 1

			for(int i = 1; i <= length; i++) {
				
				String[] info = lineList.get(i-1);

				it.forms[i] = info[0]; //normalize(

				it.lemmas[i] = "_";
				it.plemmas[i] ="_"; 
				
				// 3 cpos
					
				it.gpos[i] = info[1];  
				it.ppos[i] = info[1];
				
				it.ofeats[i]="_";
				


				it.feats[i]=null;
		//		it.feats[i] =info[5].split(PIPE);
				it.pfeats[i] = "_";
				

				if (info[2].equals(US)) it.heads[i]=-1;
				else it.heads[i] = Integer.parseInt(info[2]);// head



				it.labels[i] = info[3];					


			}
			return it;

		} catch(Exception e) {
			System.out.println("\n!!! Error in input file at line : "+lineNumber+" "+e.toString());
			e.printStackTrace();
			throw new Exception();
			//	return null;
		}

	}

	/**
	 * Read a instance an store it in a compressed format
	 * @param is
	 * @return
	 * @throws IOException
	 */
	final public SentenceData09 getNext(Instances is) throws Exception {

		SentenceData09 it = getNext();

		if (is !=null) insert(is,it);

		return it;

	}




	final public boolean insert(Instances is, SentenceData09 it) throws IOException {

		try {

			if(it == null) {
				inputReader.close();
				return false;
			}

			int i= is.createInstance09(it.length());

			for(int p = 0; p < it.length(); p++) {

				is.setForm(i, p, normalize(it.forms[p]));
				is.setGPos(i, p, it.gpos[p]);			

				if (it.ppos[p]==null||it.ppos[p].equals(US)) {
					is.setPPoss(i, p, it.gpos[p]);
				} else is.setPPoss(i, p, it.ppos[p]);


				if (it.plemmas[p]==null ||it.plemmas[p].equals(US)) {
					is.setLemma(i, p, normalize(it.forms[p]));
				} else is.setLemma(i, p, normalize(it.plemmas[p]));


				is.setFeats(i,p,it.feats[p]);


				is.setFeature(i,p,it.ofeats[p]);


				is.setRel(i,p,it.labels[p]);
				if (it.plabels!=null) is.setPRel(i,p,it.plabels[p]);
				is.setHead(i,p,it.heads[p]);
				if (it.pheads!=null) is.setPHead(i,p,it.pheads[p]);

				if (it.fillp!=null && it.fillp[p]!=null && it.fillp[p].startsWith("Y")) is.pfill[i].set(p);
				else is.pfill[i].clear(p);
			}

			if (is.createSem(i,it)) {
				DB.println("count "+i+" len "+it.length());
				DB.println(it.printSem());
			}
		} catch(Exception e ){
			DB.println("head "+it);
			e.printStackTrace();
		}
		return true;

	}
	public static String normalize (String s) {
		if (!normalizeOn) return s;
		if(s.matches(NUMBER))  return NUM;
		return s;
	}	

}
